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Published on: October 5, 2019
Electronic Energy Meter Based on a Tunnel Magnetoresistive Effect (TMR) Current Sensor
Enrique García Vidal1, Diego Ramírez Muñoz2, Sergio Iván Ravelo Arias3
1Department of Electronics Engineering, University of Valencia, 46010 Valencia, Spain. engarvi@alumni.uv.es.
Abstract:
In the present work, the design and microfabrication of a tunneling magnetoresistance (TMR) electrical current sensor is presented. After its physical and electrical characterization, a wattmeter is developed to determine the active power delivered to a load from the AC 50/60 Hz mains line. Experimental results are shown up to 1000 W of power load. A relative uncertainty of less than 1.5% with resistive load and less than 1% with capacitive load was obtained. The described application is an example of how TMR sensing technology can play a relevant role in the management and control of electrical energy.
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